Intermediate
30 min
0

Achieve continuous insights into current fluctuations using ACHS-7194 and TM4C129LNCZAD

Amp Up Accuracy

Hall Current 10 Click with UNI-DS v8

Published Aug 12, 2023

Click board™

Hall Current 10 Click

Development board

UNI-DS v8

Compiler

NECTO Studio

MCU

TM4C129LNCZAD

Maximize the lifespan of your equipment by utilizing our Hall-effect current sensing solution, which assists in identifying overload conditions and preventing potential damage

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Hardware Overview

How does it work?

Hall Current 10 Click is based on the ACHS-7194, a Hall-effect current sensor from Broadcom Limited that sends an analog voltage proportional to the magnetic field intensity caused by the current flowing through the primary input conductor. Without a magnetic field, the output voltage is half of the supply voltage. The ACHS-7194 can detect both DC and AC, designed for the current range of ±40A. Device accuracy is optimized across the operating ambient temperature through the close proximity of the magnetic signal to the Hall sensors. The copper conductor's thickness allows the device's survival at high overcurrent conditions. The terminals of the conductive path are electrically

isolated from the signal leads. This feature enables the ACHS-7194 to be used in applications requiring electrical isolation without optoisolators or other costly isolation techniques. The ACHS-7194 also has a ratiometric output, which changes proportionally to the supply voltage. Just like that, the output voltage, analog signal, can be converted to a digital value using MCP3221, a successive approximation A/D converter with a 12-bit resolution from Microchip, using a 2-wire I2C compatible interface, or can be sent directly to an analog pin of the mikroBUS™ socket labeled as AN. Selection can be performed by onboard SMD jumper labeled ADC SEL to an appropriate position

marked as AN and I2C. With the MCP3221, data transfers at rates of up to 100kbit/s in the Standard and 400kbit/s in the Fast Mode. Also, maximum sample rates of 22.3kSPS with the MCP3221 are possible in a Continuous-Conversion Mode with a clock rate of 400kHz. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VIO SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.

Hall Current 10 Click hardware overview image
Hall Current 10 Click Current Warning image

Features overview

Development board

UNI-DS v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports a wide range of microcontrollers, such as different STM32, Kinetis, TIVA, CEC, MSP, PIC, dsPIC, PIC32, and AVR MCUs regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over WiFi. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, UNI-DS v8 provides a fluid and immersive working experience, allowing access anywhere and under any

circumstances at any time. Each part of the UNI-DS v8 development board contains the components necessary for the most efficient operation of the same board. An advanced integrated CODEGRIP programmer/debugger module offers many valuable programming/debugging options, including support for JTAG, SWD, and SWO Trace (Single Wire Output)), and seamless integration with the Mikroe software environment. Besides, it also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector. Communication options such as USB-UART, USB

HOST/DEVICE, CAN (on the MCU card, if supported), and Ethernet is also included. In addition, it also has the well-established mikroBUS™ standard, a standardized socket for the MCU card (SiBRAIN standard), and two display options for the TFT board line of products and character-based LCD. UNI-DS v8 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

UNI-DS v8 horizontal image

Microcontroller Overview

MCU Card / MCU

default

Type

8th Generation

Architecture

ARM Cortex-M4

MCU Memory (KB)

1024

Silicon Vendor

Texas Instruments

Pin count

212

RAM (Bytes)

262144

Used MCU Pins

mikroBUS™ mapper

Analog Signal
PE3
AN
NC
NC
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
I2C Clock
PB2
SCL
I2C Data
PB3
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Schematic

Hall Current 10 Click Schematic schematic

Step by step

Project assembly

Fusion for PIC v8 front image hardware assembly

Start by selecting your development board and Click board™. Begin with the UNI-DS v8 as your development board.

Fusion for PIC v8 front image hardware assembly
GNSS2 Click front image hardware assembly
SiBRAIN for PIC32MZ1024EFK144 front image hardware assembly
GNSS2 Click complete accessories setup image hardware assembly
v8 SiBRAIN Access MB 1 - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
NECTO Compiler Selection Step Image hardware assembly
NECTO Output Selection Step Image hardware assembly
Necto image step 6 hardware assembly
Necto image step 7 hardware assembly
Necto image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto PreFlash Image hardware assembly

Track your results in real time

Application Output

After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.

UART Application Output Step 1

Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.

UART Application Output Step 2

In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".

UART Application Output Step 3

The next step is to click on the "CONNECT" button, after which the terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.

UART Application Output Step 4

Software Support

Library Description

This library contains API for Hall Current 10 Click driver.

Key functions:

  • hallcurrent10_read_adc - Hall Current 10 I2C ADC reading function

  • hallcurrent10_get_adc_volatge - Hall Current 10 get ADC voltage function

  • hallcurrent10_get_current - Hall Current 10 get current function

Open Source

Code example

This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.

/*!
 * @file main.c
 * @brief HallCurrent10 Click example
 *
 * # Description
 * This library contains API for Hall Current 10 Click driver.
 * The demo application reads ADC value, ADC voltage and current value.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes I2C driver and log UART.
 * After driver initialization the app set default settings.
 *
 * ## Application Task
 * This is an example that demonstrates the use of the Hall Current 10 Click board™.
 * In this example, we read and display the ADC values and current ( mA ) data.
 * Results are being sent to the Usart Terminal where you can track their changes.
 *
 * @author Nenad Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "hallcurrent10.h"

static hallcurrent10_t hallcurrent10;
static log_t logger;
static uint16_t adc_data;
static float current;
static float adc_voltage;

void application_init ( void ) 
{
    log_cfg_t log_cfg;                      /**< Logger config object. */
    hallcurrent10_cfg_t hallcurrent10_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    hallcurrent10_cfg_setup( &hallcurrent10_cfg );
    HALLCURRENT10_MAP_MIKROBUS( hallcurrent10_cfg, MIKROBUS_1 );
    err_t init_flag = hallcurrent10_init( &hallcurrent10, &hallcurrent10_cfg );
    if ( I2C_MASTER_ERROR == init_flag ) 
    {
        log_info( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    hallcurrent10_default_cfg ( &hallcurrent10 );
    log_info( &logger, " Application Task " );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms( 100 );
}

void application_task ( void ) 
{
    hallcurrent10_read_adc( &hallcurrent10, &adc_data );
    log_printf( &logger, " ADC Value   : %d \r\n", adc_data );
    Delay_ms( 100 );
    
    hallcurrent10_get_adc_volatge( &hallcurrent10, &adc_voltage );
    log_printf( &logger, " ADC Voltage : %.2f mV \r\n", adc_voltage );
    log_printf( &logger, "- - - - - - - - - - -  - -\r\n" );
    Delay_ms( 100 );
    
    hallcurrent10_get_current ( &hallcurrent10, &current );
    log_printf( &logger, " Current     : %.2f mA \r\n", current );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms( 2000 );
}

void main ( void ) 
{
    application_init( );

    for ( ; ; ) 
    {
        application_task( );
    }
}

// ------------------------------------------------------------------------ END

Additional Support

Resources